TIAB SA 537CL2yog Q + T siab hlab ntsha hlau ua raws li ASME SA537 Chav Kawm 2, khav theeb tawm lub zog Ntau dua lossis sib npaug rau 415MPa, zoo heev qis- kub toughness thiab nruj tshuaj tswj. Siv dav hauv cov roj & roj, lub zog tsim hluav taws xob thiab thaj chaw sab nraud rau cov hlab ntsha siab, LNG tso tsheb hlau luam, thiab lwm yam, nws yuav tsum tau ua kom sov, qis - hydrogen vuam thiab tom qab- vuam cua sov kho, nrog rau kev tshuaj xyuas ultrasonic kom tsis muaj teeb meem - ua haujlwm dawb.
Kev xav tau tshuaj
| Element | Cov ntsiab lus % |
|---|---|
| Carbon, max | 0.24 |
| Manganese: | |
| 1 1/2in. (40 hli) thiab nyob rau hauv thickness | |
| Kev ntsuas kub | 0.70-1.35 |
| Kev tshuaj xyuas cov khoom | 0.64-1.46 |
| Tshaj 1 1/2in. (40 hli) thickness | |
| Kev ntsuas kub | 1.00-1.60 |
| Kev tshuaj xyuas cov khoom | 0.92-1.72 |
| Phosphorus, max | 0.025 |
| Sulfur, max | 0.025 |
| Silicon | |
| Kev ntsuas kub | 0.15-0.50 |
| Kev tshuaj xyuas cov khoom | 0.13-0.55 |
| Tooj liab, max: | |
| Kev ntsuas kub | 0.35 |
| Kev tshuaj xyuas cov khoom | 0.38 |
| Nickel, max: | |
| Kev ntsuas kub | 0.25 |
| Kev tshuaj xyuas cov khoom | 0.28 |
| Chromium, max: | |
| Kev ntsuas kub | 0.25 |
| Kev tshuaj xyuas cov khoom | 0.29 |
| Molybdenum, max: | |
| Kev ntsuas kub | 0.08 |
| Kev tshuaj xyuas cov khoom | 0.09 |
Tensile Requirements
| TIAB SA 537 Chav kawm 2 Ksi (MPa) |
|
|---|---|
| Tensile zog, ksi (MPa) | |
| 2-1/2 nti thiab hauv qab | 80-100 |
| (65mm thiab qis dua) | (550-690) |
| Tshaj 2-1 / 2 rau 4 nyob rau hauv., incl | 75-95 |
| (Ntau tshaj 65-100 mm, incl) | (515-655) |
| Tshaj 4 mus rau 6 in., incl | 70-90 |
| (Ntau tshaj 100 mus rau 150 mm, incl) | (485-620) |
| Yield zog, min. | |
| 2-1/2 nti thiab hauv qab | 60 |
| (65mm thiab qis dua) | (415) |
| Tshaj 2-1 / 2 rau 4 nyob rau hauv., incl | 55 |
| (Ntau tshaj 65-100 mm, incl) | (380) |
| Tshaj 4 mus rau 6 in., incl | 46 |
| (Ntau tshaj 100 mus rau 150 mm, incl) | (315) |
| Elongation hauv 2 hauv. | |
| (50 hli), min. % | |
| 4 nti (100 mm) thiab qis dua | 22 |
| Tshaj 4 nti (100mm) | 20 |
| Elongation hauv 8 hauv. | |
| (200 hli), min,% | … |
SA537 Chav Kawm 2 Kev Ua Haujlwm
Vuam ua
Preheating: Yuav tsum tau preheating rau 95-150℃ua ntej welding, tsis txhob txias tawg los ntawm ceev ceev. Kub yuav tsum tau muab sib npaug ntawm cov khoom siv hauv paus.
Electrode Selection: Txais qis-hydrogen electrodes (xws li AWS E7018) kom txo cov ntsiab lus hydrogen hauv welds, tiv thaiv hydrogen-induced cracking.
Tom qab- Weld Heat Treatment (PWHT): Ua PWHT ntawm 595-650 degree, tuav lub sijhawm txaus, thiab maj mam txias kom tshem tawm cov kev ntxhov siab uas nyob hauv vuam thiab txhim kho weld toughness.
Machining Kev Ua Haujlwm
Txiav: Siv cov cuab yeej siab - ceev steel lossis cemented carbide; tswj kev txiav ceev (15-30m / min) thiab pub tus nqi kom tsis txhob txiav quab yuam ntau dhau.
Drilling & Milling: Khaws cov cuab yeej ruaj khov ceev, siv cov cua txias kom txo cov cua sov, tiv thaiv cov khoom tawv thiab cov cuab yeej hnav.
Kev tsim & Kev kho cua sov
Kev sib sau: Txias txoj kev yog pub rau nyias daim hlau; Kev sib sau kub (200-300 degree) yog pom zoo rau cov phaj tuab kom txo cov kev ntxhov siab.
Kev kho cua sov kawg: xa hauv quenched thiab tempered (Q + T) xeev; reheat kev kho mob tuaj yeem ua tau yog tias xav tau, kom ntseeg tau tias cov khoom siv kho tshuab zoo ib yam.
Kev kho saum npoo
Derusting: Txais kev txhaj tshuaj blasting lossis sandblasting kom tshem tawm oxide nplai thiab xeb, mus txog qib Sa2.5 rau txheej tom ntej.
Kev Tu: Ntxuav lub ntsej muag nrog cov kuab tshuaj kom tshem tawm cov roj thiab cov impurities ua ntej vuam lossis txheej, ua kom muaj kev ua haujlwm zoo.
SA537CL2 Daim ntawv thov
Roj & Roj / Petrochemical: Cov khoom siv tseem ceeb rau tuab- cov phab ntsa reactors, fractionating towers thiab siab - cov kav dej siab hauv cov roj refining, hydrocracking thiab roj tsheb thauj mus los, tiv thaiv kev kub ntxhov thiab kev yaig tawm.
Lub zog tiam: Siv nyob rau hauv siab - nruas nruas, feedwater heaters ntawm thermal fais fab chaw nres tsheb thiab theem ob ntawm cov me me modular nuclear reactors, yoog mus rau siab - qhov kub thiab txias ib puag ncig.
Cryogenic cia: Tsim LNG cia tso tsheb hlau luam thiab qis-kub thauj cov nkoj, tso siab rau qhov zoo heev uas tsis muaj- qhov kub thiab txias kom tsis txhob tawg tawg.
Cov nkoj siab: Siv nyob rau hauv fusion-welded siab hlab ntsha rau khaws cia thiab thauj siab -siab gases/kua, kom muaj kev ruaj ntseg.
Offshore Engineering: Haum rau cov khoom siv sab nrauv sab nrauv thiab cov kav dej arctic, tiv taus qhov hnyav marine siab -siab thiab qis- qhov kub thiab txias.
Tau txais cov lus muaj nuj nqis rau SA537 Chav Kawm 2, Hu rau GNEE Steel.
Cov kev ntsuam xyuas zoo li cas ntawm SA 537 Class 2 daim hlau?
Cov kev ntsuam xyuas zoo xws li tshuaj ntsuam xyuas muaj pes tsawg leeg, kev ntsuas tensile, kev ntsuas lub zog, kev ntsuas elongation, Charpy impact testing, hardness testing, and non-destructive testing (NDT) like ultrasonic or radiographic testing.
SA 537 Chav Kawm 2 puas tuaj yeem tsim ua cov duab nyuaj?
Yog lawm, SA 537 Chav Kawm 2 tuaj yeem tsim rau hauv cov duab nyuaj los ntawm cov txheej txheem xws li dov, khoov, thiab nias. Kev tsim kub kom zoo (chav kub txog 204 degree) raug pom zoo kom tsis txhob tawg thiab tswj cov khoom siv.
Dab tsi yog qhov txawv ntawm SA 537 Chav Kawm 2 thiab SA 387 Qib 11?
SA 537 Class 2 yog carbon-manganese steel, thaum SA 387 Qib 11 yog chromium-molybdenum steel. Qib 11 tau zoo dua siab dua -kub creep tsis kam, thaum Chav Kawm 2 muaj kev sib zog ua tau zoo ntawm tus nqi qis rau cov mob me me.
Dab tsi yog qhov siab tshaj carbon cov ntsiab lus tso cai hauv SA 537 Chav Kawm 2?
Qhov siab tshaj plaws carbon cov ntsiab lus tso cai nyob rau hauv SA 537 Chav Kawm 2 yog 0.25%. Kev tswj cov ntsiab lus ntawm cov pa roj carbon monoxide yog ib qho tseem ceeb los xyuas kom meej weldability thiab toughness, vim tias cov pa roj carbon ntau tuaj yeem ua rau kom brittleness thiab txo qhov sib koom ua ke zoo.
Puas yog SA 537 Chav Kawm 2 haum rau siab - cov hlab ntsha siab?
Yog lawm, SA 537 Chav Kawm 2 yog tsim rau siab - cov hlab ntsha siab. Nws cov txiaj ntsig siab thiab tensile lub zog, ua ke nrog zoo toughness thiab weldability, ua rau nws zoo tagnrho rau cov hlab ntsha ua haujlwm nyob rau hauv siab thiab nruab nrab kub.
Dab tsi yog lub luag haujlwm ntawm manganese hauv SA 537 Chav Kawm 2?
Manganese (1.00-1.60%) hauv SA 537 Chav Kawm 2 txhim kho lub zog thiab hardenability, txhim kho ductility thiab toughness, thiab tiv thaiv cov teeb meem ntawm leej faj los ntawm kev tsim manganese sulfides, txo brittleness.
Yuav ua li cas preheating kub yog pom zoo rau vuam SA 537 Class 2?
Qhov pom zoo ua ntej kub kub rau vuam SA 537 Chav Kawm 2 yog 93-204℃(200-400℃F). Preheating tiv thaiv kom txias sai ntawm thaj chaw weld, txo qhov kev pheej hmoo ntawm kev sib tsoo thiab txhim kho weld hlau fusion.
Dab tsi yog qhov tsawg kawg nkaus khoov vojvoog rau SA 537 Class 2 daim hlau?
Qhov tsawg kawg nkaus khoov vojvoog rau SA 537 Chav Kawm 2 daim hlau nyob ntawm thickness, feem ntau 1.5-3 npaug ntawm phaj thickness. Qhov no ua kom cov khoom tuaj yeem khoov tau yam tsis muaj kev tawg, tswj kev ncaj ncees thaum tsim khoom.
SA 537 Chav Kawm 2 puas tuaj yeem siv rau hauv kev siv boiler?
Yog lawm, SA 537 Chav Kawm 2 yog tsim rau kev siv boiler, tshwj xeeb tshaj yog rau boiler nruas thiab siab qhov chaw ua hauj lwm nyob rau hauv nruab nrab kub thiab siab. Nws ua tau raws li ASTM cov qauv rau cov khoom siv boiler kev ntseeg tau thiab kev nyab xeeb.
Lub neej txee ntawm SA 537 Chav Kawm 2 yog dab tsi yog tias khaws cia zoo?
Thaum muab khaws cia rau hauv qhov chaw qhuav, npog qhov chaw (tawm ntawm cov dej noo, cov pa roj corrosive, thiab qhov kub thiab txias), SA 537 Chav Kawm 2 daim hlau muaj lub neej tsis muaj hnub kawg. Kev cia kom zoo tiv thaiv xeb thiab degradation ntawm txhua yam khoom.